Hard to view is as a movie and not a milestone. Lots of very funny stuff. A classic.
Leonard Maltin/Plot synopsis:
Spoof of early 1960s college life is only sporadically funny, depends largely on Belushi's mugging as frat-house animal. Not nearly as roisterous or amusing as any issue of the Lampoon, but it became a tremendous hit--and spawned a number of truly terrible imitations--as well as a short-lived TV series, Delta House.